• 한국식품조리과학회지
• /
• 제28권6호
• /
• pp.773-779
• /
• 2012

This study was conducted to investigate the physiological activities of saccharified cherry tomato gruel containing different levels(0, 15, 30, and 45%) of cherry tomato puree. The total phenolic compound and flavonoids contents of saccharified cherry tomato gruel with cherry tomato puree were 1.73-5.09 mg/g and 0.28-7.01 mg/g, respectively. DPPH radical scavenging activities of saccharified cherry tomato gruel with cherry tomato puree were 8.67-92.58%, respectively. The ABTS radical scavenging activities of saccharified cherry tomato gruel with cherry tomato puree ranged from 6.02 to 61.59%. The ACE inhibitory activity of cherry tomato rice gruel increased with cherry tomato puree showed a range of 38.85-62.15%, respectively. With increasing additions of cherry tomato puree, the total phenolic compound and flavonoid contents, DPPH and ABTS radical scavenging activities and, ACE inhibitory activities were increased significantly (p<0.05). In conclusion, saccharified cherry tomato gruel could be used as a gruel processing method to in order to increase the functional values of gruels.

• 한국초등과학교육학회지:초등과학교육
• /
• 제39권2호
• /
• pp.168-182
• /
• 2020

This study investigated how elementary students' science-related affective characteristics and their perception of measurement changed following participation in citizen science activities through a GLOBE program. Before and after the activities, test of positive experiences about science (PES) and perception of measurement were conducted with twelve fourth grade students. In addition, the teacher who participated in the GLOBE program with students observed and recorded the students' involvement, conversation and behavior to qualitatively analyze the value of the program and the students' perceptions of measurement. After the end of the program, an open questionnaire was conducted to fill any gaps in these observations. The results showed that citizen science activities had a positive impact on elementary students' science-related affective characteristics. In all areas of PES test, the post-test scores were higher than the pre-test results, and a statistically significant difference was seen in the 'science learning motivation' area. Furthermore, students' perception of the value and meaning of measurements was seen to deepen through ongoing global environmental data measurement activities. And their understanding of various units of measurement and numerous situations in which they might need to make measurements was also elaborated.

• 한국전문물리치료학회지
• /
• 제6권2호
• /
• pp.32-42
• /
• 1999

This study was conducted to identify the effects of high-heel shoes on EMG activities of rectus femoris and biceps femoris in 28 healthy women. Subjects were composed of experimental group (wearing high-heel shoes) and control group (wearing low-heel shoes). Two groups participated in three conditions standing (bare foot wearing athletic shoes and 7.5 cm height shoes). In high-heel shoes condition, EMG activities of rectus femoris of control group were significantly lower than that of biceps femoris of experimental group, but EMG activities of both muscles of experimental group did not should significant difference. In bare foot standing condition, EMG activities of rectus femoris of experimental group were significantly lower than that of biceps femoris but EMG activities of both muscles of control group had no significant difference. These results showed that hamstring lengthening effects was produced when wearing high-heel shoes because the external knee extension moment was increased. In the short term, high-heel shoes effect on the increase of the biceps femoris activities by spindle reflex, but in the long term, the normal amplitude of the same muscle activities by Golgi tendon organ reflex.

• 한국화재소방학회:학술대회논문집
• /
• 한국화재소방학회 1997년도 International Symposium on Fire Science and Technology
• /
• pp.58-65
• /
• 1997

In this paper presented are recent international activities on fire research. After a long history of exchanging ideas in individual international groups, the International Association for Fire Safety Science (IAFSS) was founded in 1985 at its first Symposium, and in 1988, it became a registered charity in England and Wales. The primary objectives of the association are encouraging research in the science of preventing and mitigating the adverse effects of fires and of providing a forum for presenting the results such research. In order to implement the objectives, the Association has held a series of Symposia. At the same time, regional activities have been performed to expand the activities of IAFSS into every individual country. The Asia-Oceania Association for Fire Science and Technology (AOAFST) was founded in 1992 at its first Symposium and the First European Regional IAFSS Symposium was held in Zurich in 1995. Extensive activities in fire research have been performed in Asian and Oceanian countries.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2022년도 추계학술대회
• /
• pp.305-305
• /
• 2022

In this study, 139 Korean landrace sorghum germplasms collected in 10 different Korean regions were analyzed for tannin, total phenolic contents(TPC), and antioxidant activities using three assays including ABTS, DPPH, and FRAP. The Korean landrace sorghums showed significant variations of metabolite contents and antioxidant activities by collection regions. Gyeonggi sorghum had the highest tannin and TPC contents with 273.73%, 7.395mgGAE/g, respectively. Therefore, three assays of antioxidant activities of Gyeonggi sorghum, which is highly related to tannin and TPC, were also significantly higher than others. However, Gyeongnam sorghums showed the lowest tannin and TPC with 148.34% and 3.482mgGAE/g, thus, three antioxidnat activities showed the lowest levels. Three accessions(IT322580, IT340261 and IT329053) had the highest tannin levels over 400%, but, two accessions (IT322613, IT270366) showed less than 1% of tannin content. Four accessions (IT270349, IT286448, IT331878, and IT251882) showed the highest level of TPC over 9mgGAE/g. In this study, antioxidant activities with three assays were strongly related to tannins and TPC, and TPC showed higher significance than tannin with all three antioxidant activities. The germplasms with the highest overall antioxidant activity were IT270349, IT340261, and IT286448, which had the highest levels of tannin and TPC. The principal component analysis presented that 2 sub-populations were divided. Gyeonggi and Gangwon Yeongseo sorghums, which had high metabolite contents and antioxidant activity levels, were mainly included in group 1. Gyeongnam and Jeonnam sorghums, which had low metabolite and antioxidant activity levels, were mainly included in group 2. This results could contribute to discover breeding metarials for the development of functional sorghum varieties.

• 한국과학교육학회지
• /
• 제33권5호
• /
• pp.1007-1020
• /
• 2013

본 연구는 과학-예술통합 수업을 진행하고 있는 초등 교사들의 과학-예술통합 활동에 대한 인식과 수업의 접근법, 어려움 및 개선방안을 탐색하는 것을 목적으로 한다. 이를 위하여 초등학교 3학년에서 6학년을 담당하는 교사 12명을 연구 참여자로 선정하였다. 자료 수집은 연구 참여자와의 심층 면담을 통해 이루어졌으며, 면담 시간은 60분에서 90분으로 이루어졌다. 면담은 연구 참여자의 과학-예술통합 수업에 대한 인식과 수업에서의 목표 및 강조점, 어려움 및 개선방안 등을 물어보는 형식으로 이루어졌다. 연구 결과, 초등 교사들은 과학-예술통합 수업이 과학 개념의 재정리, 긍정적인 태도 향상, 적극적인 수업 참여 유도, 자유로운 의사표현의 긍정적인 교육적 효과를 지니고 있다고 인식하고 있었다. 또한 수업 접근법에서는 교사들은 과학 개념의 재정리, 추상적 과학 개념의 시각화, 예술 과목과의 연계의 세 가지 측면에서 과학-예술통합 활동을 수업에 적용하고 있었다. 한편 초등 교사들은 수업 자료의 부족과 외부 환경의 제약, 학생간의 편차로 인해 과학-예술통합 활동을 활용하는 데에 어려움을 겪고 있었다. 이러한 교사들의 인식은 다양한 수업 자료의 보충 및 교사의 역량 강화 필요성에 대한 요구로 이어졌다. 결론 및 제언에서는 이상의 연구 결과를 바탕으로 초등 교육에서 과학-예술통합 수업에 대하여 시사점을 논의하였다.

• Food Science and Biotechnology
• /
• 제18권2호
• /
• pp.419-424
• /
• 2009

Water and 70% ethanol extracts obtained from a sea cucumber (Stichopus japonicus) body wall by heat reflux or pressurized solvent extraction showed 2,2-diphenyl-1-picrylhydrazyl ($DPPH^{\cdot}$) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation ($ABTS^{{\cdot}+}$) scavenging activities comparable to those of fruits and vegetables. The highest activities were observed for the water extract from heat reflux extraction. Crude saponins exhibited higher radical scavenging activities than the soluble matters in the extracts. However, they were responsible for only about 3 to 15% of the scavenging activities of the extracts. Total phenolic contents showed a significant correlation with $DPPH^{\cdot}$ scavenging activities, suggesting a significant contribution of phenolic constituents to the antioxidant properties of the extracts. However, total flavonoid contents showed little correlation with the radical scavenging activities. The results suggest that the water or 70% ethanol extract obtained from sea cucumber body wall by simple heat reflux extraction could provide considerable antioxidant benefits.

• 한국보육지원학회지
• /
• 제13권2호
• /
• pp.39-57
• /
• 2017

Objective: This study aims to investigate the effects of science activities related to seasonal customs on young children's scientific inquiry abilities and communicative competences. Methods: Participants consisted of twenty-six 5-year-old children who were going to day care center in Gwangju metropolitan city. Half of them belonged to the experimental group and the other half to the comparative group. The experimental group participated in science activities related to seasonal customs, and the comparative group participated in science activities according to the Nuri curriculum. Results: The results of this study showed that scientific inquiry abilities and communicative competences of the young children in the experimental group were meaningfully improved. That is to say, the scores of the five sub factors of scientific inquiry abilities and the two sub factors of communicative competences of the experimental group were meaningfully higher than those of the comparative group. Conclusion/Implications: It is significant that this study provides basic information for future science activities related to seasonal customs that will be conducted in the early childhood field.

• Journal of Information Technology Applications and Management
• /
• 제21권3호
• /
• pp.1-17
• /
• 2014

In this study, various characteristics of R&D related economic variables were studied to analyze complexity of science and technology activities in Korea, as reliance of R&D activities of the private sector is growing by the day. In comparison to other countries, this means that it is likely to be fluctuated by economic conditions. This complexity characteristic signifies that the result of science and technology activities can be greatly different from the anticipated results - depending on the influences from economic conditions and the results of science and technology activities which may be unpredictable. After reviewing the results of 17 variables related to science and technology characteristics of complex systems intended for time-series data - in the total R&D expenditure, and private R&D expenditure, numbers of SCI papers, the existence of chaotic characteristics were. using Lyapunov Exponent, Hurst Exponent, BDS test. This result reveals science and technology activity of the three most important components in Korea which are; heavy dependence on initial condition, the long term memory of time series, and non-linear structure. As stable R&D investment and result are needed in order to maintain steady development of Korea economy, the R&D structure should be less influenced by business cycles and more effective technology development policy for improving human resource development must be set in motion. And to minimize the risk of new technology, the construction of sophisticated technology forecasting system should take into account, for development of R&D system.

• 한국작물학회지
• /
• 제45권5호
• /
• pp.277-281
• /
• 2000

Fifty-four Korean native and 28 foreign varieties harvested in 1998 and 1999 were examined for superoxide dismutase (SOD) and peroxidase (POD) activities. The SOD and POD activities of leaves extracts in Korean native and foreign rice varieties showed variation at the heading stage. The activities of SOD and POD changed with growth stage. In comparison of storage duration, the SOD and POD activities of the extract from three months stored seeds in Korean native (CV=53.3%) and foreign rice (CV=57.9%) varieties were higher than that of stored rices for a year in seed extracts although the activities among varieties did not show significant variation. Also, the averaged activity of foreign rice varieties (SOD=12.9%) was relatively higher than that of korean native rice varieties (SOD=10.7%). The test of activity at the enzymatic level related to antioxidative activity suggests that the rice varieties with higher antioxidative potentials can be developed and also may provide information with rice breeder to breed rice variety with a high antioxidative activity.